slight update for 0.9.3-alpha

Docker file updates

enhanced git ignore

Updated version to 0.9.3-alpha; upgrade to Java 8

Fixed docker file for image artifact

Removed commendted out code.

Installed Spotify Docker Maven plugin to produce Docker image artifact

Upgraded Dropwizard to version 0.9.1

Added logging of server configuration property settings

Added application.properties configuration

enhance comments

Advance to 0.9.2-alpha version

Enhanced to provide default configuration

added default logback configuration

part 1 docker artifact methodology change